Commands by bartman (2)

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

Share Your Commands

Check These Out

Size (in bytes) of all RPM packages installed
This command will output the size of all RPM packages and string them together into one enormous addition command which will be calculated by the echo $(( ))

Display text as though it is being typed out in real time
Pipe Viewer allows you to monitor the progress of a data transfer or command, or to show the time elapsed, among other things. In this use, it limits the transfer rate of the echo command to 10 bytes per second, making your text appear to be typed out in real time as in Hollywood movies. Fun!

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Remove all .svn folders

Change every instance of OLD to NEW in file FILE
Very quick way to change a word in a file. I use it all the time to change variable names in my PHP scripts (sed -i 's/$oldvar/$newvar/g' index.php)

Show URL/text in clipboard as QR code
Copy a URL (or Thai text, or whatever) and hit the keyboard shortcut for this fu to display it as a QR code. It's an "air gapped" way to send stuff to your phone [unlike google chart API etc.] as long as you watch out for cameras ;). dependencies [sudo apt-get install]: qrencode xclip xloadimage

Manipulate the metadata and edit the create time (This will change date to 1986:11:05 12:00 - Date: 1986 5th November, Time: 12.00) and then it will set modify date to the same as alldate.

Programmatic way to find and set your timezone
1. it find your public ip via ifconfig.io 2. than use this IP to request your timezone via worldtimeapi.org 3. and send it to the command timedatectl set-timezone

Automagically update grub.conf labels after installing a new kernel
I like to label my grub boot options with the correct kernel version/build. After building and installing a new kernel with "make install" I had to edit my grub.conf by hand. To avoid this, I've decided to write this little command line to: 1. read the version/build part of the filename to which the kernel symlinks point 2. replace the first label lines of grub.conf grub.conf label lines must be in this format: Latest [{name}-{version/build}] Old [{name}-{version/build}] only the {version/build} part is substituted. For instance: title Latest [GNU/Linux-2.6.31-gentoo-r10.201003] would turn to title Latest [GNU/Linux-2.6.32-gentoo-r7.201004]"

bash script to zip a folder while ignoring git files and copying it to dropbox
Better tool for exporting git's repository is Git itself!

Stay in the loop…

Follow the Tweets.

Every new command is wrapped in a tweet and posted to Twitter. Following the stream is a great way of staying abreast of the latest commands. For the more discerning, there are Twitter accounts for commands that get a minimum of 3 and 10 votes - that way only the great commands get tweeted.

» http://twitter.com/commandlinefu
» http://twitter.com/commandlinefu3
» http://twitter.com/commandlinefu10

Subscribe to the feeds.

Use your favourite RSS aggregator to stay in touch with the latest commands. There are feeds mirroring the 3 Twitter streams as well as for virtually every other subset (users, tags, functions,…):

Subscribe to the feed for: